US5636607A - Plastic valve cover with integral noise shield - Google Patents

Plastic valve cover with integral noise shield Download PDF

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Publication number
US5636607A
US5636607A US08/672,828 US67282896A US5636607A US 5636607 A US5636607 A US 5636607A US 67282896 A US67282896 A US 67282896A US 5636607 A US5636607 A US 5636607A
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US
United States
Prior art keywords
valve cover
cover according
inner shell
cap
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/672,828
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English (en)
Inventor
Eric R. Sattler
Joel S. Myers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Corp
Original Assignee
BASF Corp
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Filing date
Publication date
Application filed by BASF Corp filed Critical BASF Corp
Priority to US08/672,828 priority Critical patent/US5636607A/en
Assigned to BASF CORPORATION reassignment BASF CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MYERS, JOEL S., SATTLER, ERIC R.
Priority to CA002200221A priority patent/CA2200221C/fr
Priority to MX9702129A priority patent/MX9702129A/es
Application granted granted Critical
Publication of US5636607A publication Critical patent/US5636607A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/008—Sound insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the present invention relates to valve covers for use with internal combustion engines, and more particularly, to a plastic valve cover with an integral noise shield.
  • Valve trains as the term is used herein, generally include the intake and exhaust valves as well as the apparatus for operating the valves including rocker arms, cams and valve springs.
  • valve covers are a simple, open-ended box which bolts to the cylinder head. To seal against oil leaks around the open end of the box gaskets are often employed.
  • the conventional valve covers are made of metal or thermoset plastics having a simple shell shape.
  • a perceived problem with conventional valve train covers is that they fail to provide sufficient noise insulating properties. Accordingly, it is desirable in the art of valve cover design to provide a valve cover with a noise shield for quieting the noise emitted from the valve train of an internal combustion engine.
  • valve train cover that is lighter than conventional steel or aluminum valve train covers.
  • valve train cover which reduces the need for an external noise shield on an engine or within an engine compartment.
  • the present invention therefore provides a plastic valve cover, for use with an internal combustion engine, having an integral noise shield.
  • FIG. 1 is a perspective view of a plastic valve cover with integral noise shield according to the principles of the present invention
  • FIG. 2 is a side view of a valve cover body according to the principles of the present invention.
  • FIG. 3 is an end view of a valve cover body according to the principles of the present invention.
  • FIG. 4 is a bottom view of a cap member for covering said valve cover body according to the principles of the present invention.
  • FIG. 5 is a side view of a cap member for covering said valve cover body according to the principles of the present invention.
  • FIG. 6 is a cross-sectional view of the valve cover according to the principles of the present invention taken along line 6--6 of FIG. 1.
  • FIGS. 1-6 illustrate a preferred embodiment of the present invention.
  • a valve cover 10 is illustrated including a valve cover body 12 having a pair of sidewalls 14 connected to one another by a pair of end walls 16.
  • An inner shell portion 18 (shown in phantom) is disposed within valve cover body 12 for providing a first noise shield for the valve cover 10.
  • a cap member 20 is provided for engaging with an upper surface 14a, 16a, respectively, of walls 14, 16.
  • An enclosed space 22 is defined between inner shell portion 18 and cap member 20.
  • cap member 20 along with sidewalls 14 and end walls 16 define a second noise shield.
  • Valve cover body 12 is provided with a plurality of bosses 24 each having a bolt hole 26 therethrough, and cap member 20 is provided with a plurality of bolt holes 28 corresponding to bosses 24 such that a plurality of bolts (not shown) can be inserted through bolt holes 26 and 28 for securely fastening valve cover 10 to an internal combustion engine.
  • a press fit cover can also be used with the present invention.
  • inner shell 18 is provided with an oil spout 30.
  • oil spout 30 in a typical V-type engine, separate valve covers are provided for the valve trains on each side of the engine. However, only one of the valve covers is typically provided with an oil spout for the introduction of oil into the engine. Therefore, although the drawings of the instant application illustrate an oil spout 30 in a valve cover 10, it should be understood that the valve cover design of the present invention should not be construed as limited to having an oil spout for certain embodiments.
  • Oil spout 30 is integrally molded with inner shell 18. Oil spout 30 projects up through a corresponding opening 32 in cap 20. A groove 34 is provided around a periphery of oil spout 30. Groove 34 is designed to receive a sealing gasket (not shown) which is designed to prevent intrusion of foreign materials into the space provided between inner shell 18 and cap 20. Cap 20 is provided with an annular ring 36 around opening 32 in order to provide a sealed relationship along with the gasket provided in groove 34 of oil spout 30.
  • Valve cover body 12 is provided with a base portion 44, as shown in FIG. 6, which connects with inner shell 18.
  • valve cover body 12 and inner shell 18 are formed as a unitary member from an engineering plastic material.
  • a sealing lip portion 46 extends beneath base portion 44, as shown in FIG. 6, and is designed to lie on the inside of a flange of a cylinder head.
  • cap 20 is provided with a plurality of guide flanges 50a, 50b which facilitate the placement of cap 20 on valve cover body 12.
  • Outer flange members 50a are disposed on an outward side of walls 14, 16 of valve cover body 12, as shown in FIG. 1.
  • Inner guide flanges 50b are provided to be disposed on an inward side of walls 14, 16 of valve cover body 12.
  • a gasket or other sealing means may be disposed between cap 20 and valve cover body 12.
  • valve cover 10 a cross-sectional view of valve cover 10 is shown taken along line 6--6 of FIG. 1.
  • inner shell 18 is connected to valve cover body 12 by base portion 44.
  • the inner shell 18 and valve cover body 12 are formed as a unitary member.
  • Inner shell 18 is provided with a pair of sidewalls 54 which are connected to one another by arcuate upper wall 56.
  • Insulating filler material 60 may be provided in the enclosed space 22 between inner shell 18 and sidewalls 14 as well as between inner shell 18 and cap 20.
  • the cross-sectional view of FIG. 6 is taken through bosses 24 provided in sidewalls 14 of valve cover body 12. As stated previously, Bosses 24 each define bolt hole 26 which corresponds with bolt holes 28 in cap 20.
  • valve cover body 12 is preferably formed as a unitary member with inner shell 18.
  • Valve body cover 12 and inner shell 18 are preferably formed of an engineering plastic material having suitable performance properties such as desirable heat stability and dimensional stability and utilizing conventional plastic molding techniques such as injection molding, for example.
  • Illustrative materials are nylon (polyamide), a polybutylene terephthalate (PBT) or a PBT and acrylonitrile styrene acrylate (ASA) blend, ABS polymer (acrylonitrile-butadiene-styrene), and polycarbonate.
  • Such materials may also be reinforced with glass and/or mineral fibers or particles.
  • ULTRAMID® A3HG7 Blk Q17 20560 nylon ULTRAMID® A3WG7 Blk 23210 nylon
  • ULTRAMID® B3WG7 Blk 564 BGVW nylon ULTRAMID® B3GM35 nylon, commercially from BASF Corporation of Wyandotte, Mich.
  • the insulating filler material 60 provided between inner shell 18 and cap 20 can be any known noise insulating material such as foams, silicates, fluids, fibers, and organic by-products such as walnut shells. While it is often preferable to employ a noise insulating material is the space 22 between inner shell 18 and cap 20 it should be understood that the space can remain empty.
  • bosses 24 are provided for increasing the stiffness of valve cover body 12.
  • a problem with direct conversion of conventional steel or aluminum valve cover designs into plastic material is that the plastic material has a reduced stiffness in comparison to the steel or aluminum.
  • the bosses 24 provide adequate stiffness for securing valve cover 10 to an engine valve train for preventing leaks between the valve cover 10 and the engine valve train.
  • the sealing lip portion 46 is provided for preventing oil leakage.
  • a gasket (not shown) may be used between walls 14, 16 of valve cover 10 and the engine valve train.
  • the inner shell 18 provides a first noise shield for the noise generated by the engine valve train.
  • the valve cover body 12 combines with cap 20 to provide a second noise shield for the noise generated by the engine valve train.
  • Noise insulating material is also optionally provided between the first and second noise shields for further reducing the noise emitted from the engine valve train.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US08/672,828 1996-06-28 1996-06-28 Plastic valve cover with integral noise shield Expired - Lifetime US5636607A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US08/672,828 US5636607A (en) 1996-06-28 1996-06-28 Plastic valve cover with integral noise shield
CA002200221A CA2200221C (fr) 1996-06-28 1997-03-17 Couvercle de culasse avec paroi d'insonorisation incorporee
MX9702129A MX9702129A (es) 1996-06-28 1997-03-20 Cubierta de valvula de plastico con protector de ruido integral.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/672,828 US5636607A (en) 1996-06-28 1996-06-28 Plastic valve cover with integral noise shield

Publications (1)

Publication Number Publication Date
US5636607A true US5636607A (en) 1997-06-10

Family

ID=24700186

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/672,828 Expired - Lifetime US5636607A (en) 1996-06-28 1996-06-28 Plastic valve cover with integral noise shield

Country Status (3)

Country Link
US (1) US5636607A (fr)
CA (1) CA2200221C (fr)
MX (1) MX9702129A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801071A1 (fr) * 1999-11-17 2001-05-18 Renault Moteur thermique comportant un couvre-culasse pour culasse munie d'actionneurs electromagnetiques
US6543404B2 (en) 2001-04-04 2003-04-08 Dow Global Technologies, Inc. Adhesively bonded engine intake manifold assembly
US20030214082A1 (en) * 2002-05-15 2003-11-20 Dow Global Technologies, Inc. Automotive valve cover with integral positive crankcase ventilation
US20040121674A1 (en) * 2002-12-18 2004-06-24 Robbins Jeffrey R. Composite engine component and method for making the same
US20050005890A1 (en) * 2003-07-10 2005-01-13 Dow Global Technologies Inc. Engine intake manifold assembly
US20090071747A1 (en) * 2007-09-14 2009-03-19 Gm Global Technology Operations, Inc. Engine acoustic treatment
US20110017166A1 (en) * 2009-07-23 2011-01-27 Briggs & Stratton Corporation Rocker cover system
US20110168710A1 (en) * 2010-01-11 2011-07-14 Novo Motor Acoustic Systems Inc. Rotatable access closure element
USD657798S1 (en) 2011-04-08 2012-04-17 Specialty Auto Parts U.S.A., Inc. Valve cover
USD670360S1 (en) 2010-09-23 2012-11-06 Specialty Auto Parts U.S.A., Inc. Valve cover

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1306807A (en) * 1969-11-28 1973-02-14 Lambert Bros Walsall Ltd Lined tanks
GB1307868A (en) * 1969-07-30 1973-02-21 Normandie Const Mec Production of hull or deck plating
GB1400447A (en) * 1971-08-13 1975-07-16 Tac Construction Materials Ltd Insulating structures
US4048366A (en) * 1974-07-26 1977-09-13 British Uralite Limited Noise control materials
GB1516150A (en) * 1974-09-20 1978-06-28 Nihon Soflan Chem & Eng Co Ltd Thermally insulated containers for liquefied gas
US4213440A (en) * 1977-11-26 1980-07-22 Nissan Motor Company, Limited Low-noise-level reciprocating piston engine
US4522165A (en) * 1979-06-02 1985-06-11 Nissan Motor Company, Limited Noise reducing cover for an internal combustion engine
US4611687A (en) * 1985-07-23 1986-09-16 Nixon Michael T Three-function acoustical panel
US4771747A (en) * 1987-12-17 1988-09-20 Caterpillar Inc. Internal combustion engine noise reduction plate
US4821699A (en) * 1988-02-08 1989-04-18 Alan Mackin Pressure distribution device for valve cover
US4938314A (en) * 1988-11-11 1990-07-03 Dr. Ing. H.C.F. Porsche Ag Plastic oil pan
US4951783A (en) * 1988-09-15 1990-08-28 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Arrangement and process for securing a threaded insert to an oil pan
USRE33575E (en) * 1987-12-17 1991-04-23 Caterpillar Inc. Internal combustion engine noise reduction plate
US5095860A (en) * 1991-06-24 1992-03-17 Newell Bobby T Engine valve cover apparatus
US5255647A (en) * 1993-02-08 1993-10-26 Freudenberg-Nok General Partnership Elastomeric grommet-fastener assembly
US5323745A (en) * 1992-03-26 1994-06-28 Tsuchiya Mfg. Co., Ltd. Plastic rocker cover
US5365901A (en) * 1993-11-15 1994-11-22 Freudenberg-Nok General Partnership Low creep flange and engine cover assembly
US5375569A (en) * 1994-01-26 1994-12-27 General Electric Company Multi polymer structures for internal combustion engines
US5452693A (en) * 1994-12-09 1995-09-26 Cummins Engine Company, Inc. Oil pan noise enclosure and attachment system for same
US5511518A (en) * 1994-11-02 1996-04-30 Fel-Pro Incorporated Sealing assembly with undercut groove

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1307868A (en) * 1969-07-30 1973-02-21 Normandie Const Mec Production of hull or deck plating
GB1306807A (en) * 1969-11-28 1973-02-14 Lambert Bros Walsall Ltd Lined tanks
GB1400447A (en) * 1971-08-13 1975-07-16 Tac Construction Materials Ltd Insulating structures
US4048366A (en) * 1974-07-26 1977-09-13 British Uralite Limited Noise control materials
GB1516150A (en) * 1974-09-20 1978-06-28 Nihon Soflan Chem & Eng Co Ltd Thermally insulated containers for liquefied gas
US4213440A (en) * 1977-11-26 1980-07-22 Nissan Motor Company, Limited Low-noise-level reciprocating piston engine
US4522165A (en) * 1979-06-02 1985-06-11 Nissan Motor Company, Limited Noise reducing cover for an internal combustion engine
US4611687A (en) * 1985-07-23 1986-09-16 Nixon Michael T Three-function acoustical panel
USRE33575E (en) * 1987-12-17 1991-04-23 Caterpillar Inc. Internal combustion engine noise reduction plate
US4771747A (en) * 1987-12-17 1988-09-20 Caterpillar Inc. Internal combustion engine noise reduction plate
US4821699A (en) * 1988-02-08 1989-04-18 Alan Mackin Pressure distribution device for valve cover
US4951783A (en) * 1988-09-15 1990-08-28 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Arrangement and process for securing a threaded insert to an oil pan
US4938314A (en) * 1988-11-11 1990-07-03 Dr. Ing. H.C.F. Porsche Ag Plastic oil pan
US5095860A (en) * 1991-06-24 1992-03-17 Newell Bobby T Engine valve cover apparatus
US5323745A (en) * 1992-03-26 1994-06-28 Tsuchiya Mfg. Co., Ltd. Plastic rocker cover
US5255647A (en) * 1993-02-08 1993-10-26 Freudenberg-Nok General Partnership Elastomeric grommet-fastener assembly
US5365901A (en) * 1993-11-15 1994-11-22 Freudenberg-Nok General Partnership Low creep flange and engine cover assembly
US5375569A (en) * 1994-01-26 1994-12-27 General Electric Company Multi polymer structures for internal combustion engines
US5511518A (en) * 1994-11-02 1996-04-30 Fel-Pro Incorporated Sealing assembly with undercut groove
US5452693A (en) * 1994-12-09 1995-09-26 Cummins Engine Company, Inc. Oil pan noise enclosure and attachment system for same

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801071A1 (fr) * 1999-11-17 2001-05-18 Renault Moteur thermique comportant un couvre-culasse pour culasse munie d'actionneurs electromagnetiques
US20070251483A1 (en) * 2001-04-04 2007-11-01 Dow Global Technologies, Inc. Adhesively bonded engine intake manifold assembly
US6543404B2 (en) 2001-04-04 2003-04-08 Dow Global Technologies, Inc. Adhesively bonded engine intake manifold assembly
US6739302B2 (en) 2001-04-04 2004-05-25 Dow Global Technologies, Inc. Adhesively bonded engine intake manifold assembly
US20040231628A1 (en) * 2001-04-04 2004-11-25 Dow Global Technologies, Inc. Adhesively bonded engine intake manifold assembly
US7475664B2 (en) 2001-04-04 2009-01-13 Dow Global Technologies Inc Adhesively bonded engine intake manifold assembly
US7213560B2 (en) 2001-04-04 2007-05-08 Dow Global Technologies, Inc. Adhesively bonded engine intake manifold assembly
US20030214082A1 (en) * 2002-05-15 2003-11-20 Dow Global Technologies, Inc. Automotive valve cover with integral positive crankcase ventilation
WO2003098023A1 (fr) * 2002-05-15 2003-11-27 Dow Global Technologies Inc. Couvercle de culasse pour automobiles muni d'un systeme integre de recyclage des gaz du carter
US6860010B2 (en) 2002-05-15 2005-03-01 Dow Global Technologies, Inc. Method of forming an automotive valve cover with integral positive crankcase ventilation
US20040121674A1 (en) * 2002-12-18 2004-06-24 Robbins Jeffrey R. Composite engine component and method for making the same
US7360519B2 (en) 2003-07-10 2008-04-22 Dow Global Technologies, Inc. Engine intake manifold assembly
US20050005890A1 (en) * 2003-07-10 2005-01-13 Dow Global Technologies Inc. Engine intake manifold assembly
US20090071747A1 (en) * 2007-09-14 2009-03-19 Gm Global Technology Operations, Inc. Engine acoustic treatment
US7770692B2 (en) * 2007-09-14 2010-08-10 Gm Global Technology Operations, Inc. Engine acoustic treatment
US20110017166A1 (en) * 2009-07-23 2011-01-27 Briggs & Stratton Corporation Rocker cover system
US8251030B2 (en) 2009-07-23 2012-08-28 Briggs & Stratton Corporation Rocker cover system
US20110168710A1 (en) * 2010-01-11 2011-07-14 Novo Motor Acoustic Systems Inc. Rotatable access closure element
US8596483B2 (en) 2010-01-11 2013-12-03 Novo Motor Acoustic Systems Inc. Rotatable access closure element
USD670360S1 (en) 2010-09-23 2012-11-06 Specialty Auto Parts U.S.A., Inc. Valve cover
USD657798S1 (en) 2011-04-08 2012-04-17 Specialty Auto Parts U.S.A., Inc. Valve cover

Also Published As

Publication number Publication date
CA2200221C (fr) 2006-10-31
MX9702129A (es) 1998-04-30
CA2200221A1 (fr) 1997-12-28

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